Pneumatic stacker



(No Model.)

F. A. PEAVEY. PNEUMATIG STAGKBR.

No. 572,768. Patented Dec. 8, 1 896.

j UNITED STATES PATENT OFFICE. 'i

FRANK ADAMS PEAVEY, on PORT HURON, MICHIGAN.

PNEUMATIC STACKERY.

SPECIFICATION. forming part of Letters Patent No. 572,768, dated December 8, 1896. Application filed April 10, 1896.3 Serial No. 586,994. (No model.)

= matic-Stacker Pipes for Threshing-Machines;

and I do declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art j to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to an improvement in supports or cranes used to sustain and manipulate the stackerpipe of a pneumatic straw-stacker upon threshing-machines.

The objects of myinvention are to construct such a crane in the lightest possible manner and so build it that its members will be subjected to direct compressional or tensional strains and not to torsional or bending strains; to so make it that it will occupy the minimum space, and to make a crane which, when not in use, can be folded into a small space.

lVith such objects in view my invention consists in two triangular levers or frames, preferably one on each side of the stackerpipe, so connected with the pipe as to sustain it in its adjusted positions, and means for operating and holding the frame in the different adjustments of the pipe.

The invention further consists in the parts and combinations thereof hereinafter described and claimed.

In the drawings, wherein I have shown a practical embodiment of my invention and in which similar letters refer to similar parts throughout the several views, Figure 1 is a side elevation of a stacker-pipe with my invention applied thereto. Fig. 2 is a plan view, and Fig. 3 is a cross-section on line 3 3 of Fig. 1.

Referring to the drawings, A is a turn-table on which a stacker-pipe B rests and to which it is secured in any preferred manner. The pipe B is shown as comprising the adjustable base-elbow and hood and the telescoping sections, as is usual with these stackers.

It will be obvious that the elbow is formed of sections hinged on their bottom side and pipe these levers may be connected by cross T tie-bars e c.

From the lower or pivoted angle of the 1evers E extend bars C O, which I may term the compression members of the crane,

which bars are made quite rigid, as they sustain considerable of the weight of the stacker. Iron pipe has been found very satisfactory for these compression members. At the outer ends of the bars 0 O is attached a yoke or collar F, which straddles the movable section of the stacker-pipe.

' D D represent tension bars or rods, each connected at one end to the yoke F and detachably connected at their opposite ends to the upper ends or angle of the triangular levers E. As the strain of these bars is always tensional they may be comparatively light, or they might be replaced by cables.

In the yokeFare mounted rollers or sheaves K, on which the movable section of the pipe is supported and adapted to move. Beneath the sheaves and connecting the ends of the yoke F is a connection 0. i

F is a yoke or collar carried by the fixed section of the pipe B, in which yoke is journaled a shaft (1, on which is a sprocket-wheel d.

m is a rod connected to the yoke F and having a sliding engagement with the connection 0. At the end of the rod m adjacent to the yoke F is suitably mounted a second sprocket m. m is a chain passing over said sprockets and secured, as at n, to the movable pipe-section. The chain can be conveniently operated to extend or contract the pipe by means of a crank 0 on the shaft d.

To elevate and lower the crane and the pipe carried thereby, I have shown mounted on the table A and adapted to be operated by any suitable means, such as a crank i, a wind lass h. To the Windlass are attached ropes g g, secured at their opposite ends to the uppermost points or angles 19 p of the leversE to pass through a low door.

E. The ropes g g follow the upper sides of the triangular levers from the points 19 p, which levers are provided at s with any suitable means to prevent the slipping of the ropes from the levers.

When it is necessary to fold the crane for entering a barn or low door, the rods D D are detached from the levers E at the points 19, and the triangular levers are dropped down upon the turn-table, and the crane is swung around until it rests upon the top of the threshing-machine. This enables the crane to be folded into small compass, enabling it By my construction the levers E take the strain upon the chains at the points 3 when the crane is in horizontal position and at the point of greatest tension. As the crane is elevated the points sleave the chains, afiording the leverage of the elevated point 19. Thus it is seen that the cable is aided in elevating the crane by a strong leverage at all points in the circle through which it traverses.

It will be noticed from the drawings that the different. parts of the frame or pipe supports form triangular members,that the greatest resistance is along the line projected by the different parts, that the greatest rigidity is secured, and at the same time the construction admits of much lighter parts than if the lines of force and strain did not coincide with the mechanical outlines of the device. At no position of the crane is the pipe which itv carries subjected. to any strain beyond that of gravity upon the point and of gravity upon its bottom support on the turn-table.

It will further be seen from the drawings that the levers E do not rise above the pipe or elbow, so allowing the crane to pass through a low door. The use of a triangular lever giving a bearing and purchase first from the point .9 and as the crane rises from the point p enables me to dispense with the long lever generally employed in cranes for stackerpipes as heretofore constructed; and the shape and construction of my levers bring the strain upon. the chains on good lines, the effect being practically the same as if the side of the lever E from point p to point 3 was a segment of the periphery of a-wheel with hub at f.

My crane supports the stacker-pipe as in a cradle and entirely without any strain upon the pipe when elevating or lowering it.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a stacker, the combination with a stacker-pipe, and a support therefor, of two triangular levers one on each side of the pipe and each pivoted to said support, a yoke straddling the pipe, rods connecting said yoke to the pivoted ends of said levers, members connecting said yoke with the upper ends of said levers, flexible members for operating said levers engaging along the upper edges of the levers and positively connected to the levers at their uppermost points, substantially as described.

2. In a stacker, the combination with a stacker-pipe, its elbow formed of hinged sections and adapted to be straightened outhorizontally, and a support for the pipe, of two triangular levers one on each side of the pipe and pivoted to the support, a yoke straddling the pipe, members connecting said yoke and the pivoted ends of said levers, members connecting said yoke and the upper ends of said levers, and means for operating the levers, said levers adapted to be turned down on the support, substantially as described.

3. In a stacker, the combination with the stacker-pipe and a support therefor, of two triangular levers one on each side of the pipe and pivoted to the support, a yoke straddling the pipe, rods connecting said yoke and the pivotedends of said levers, rods attached to said yoke and having ,a detachable engage ment with the upper ends of said levers, and means for operating said levers, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK ADAMS PEAVEY.

Witnesses:

O. L. PEAVEY, H. B. IIOYT. 

